Explore the world of shirts and find the perfect match here. Solid-Colored Formal Shirt: A solid-colored formal shirt is a classic wardrobe staple that every man should own. Whether you pair it with a suit for a formal event or with jeans for a more casual look, a solid-colored men’s formal shirt is always a reliable choice.If you want to buy men's shirts online, you can pick this stately and versatile Men's Slim Fit Printed Cutaway Collar Formal Shirt.